AP_BattMonitor: support selective enable of SMBUS and fuel battery monitors

libraries/AP_BattMonitor/AP_BattMonitor.cpp

@@ -112,6 +112,7 @@ AP_BattMonitor::init()
             case AP_BattMonitor_Params::BattMonitor_TYPE_ANALOG_VOLTAGE_AND_CURRENT:
                 drivers[instance] = new AP_BattMonitor_Analog(*this, state[instance], _params[instance]);
                 break;
+#if HAL_BATTMON_SMBUS_ENABLE
             case AP_BattMonitor_Params::BattMonitor_TYPE_SOLO:
                 drivers[instance] = new AP_BattMonitor_SMBus_Solo(*this, state[instance], _params[instance],
                                                                   hal.i2c_mgr->get_device(AP_BATTMONITOR_SMBUS_BUS_INTERNAL, AP_BATTMONITOR_SMBUS_I2C_ADDR,
@@ -122,6 +123,7 @@ AP_BattMonitor::init()
                                                                     hal.i2c_mgr->get_device(AP_BATTMONITOR_SMBUS_BUS_EXTERNAL, AP_BATTMONITOR_SMBUS_I2C_ADDR,
                                                                                             100000, true, 20));
                 break;
+#endif // HAL_BATTMON_SMBUS_ENABLE
             case AP_BattMonitor_Params::BattMonitor_TYPE_BEBOP:
 #if CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_BEBOP || CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_DISCO
                 drivers[instance] = new AP_BattMonitor_Bebop(*this, state[instance], _params[instance]);
@@ -140,12 +142,14 @@ AP_BattMonitor::init()
             case AP_BattMonitor_Params::BattMonitor_TYPE_Sum:
                 drivers[instance] = new AP_BattMonitor_Sum(*this, state[instance], _params[instance], instance);
                 break;
+#if HAL_BATTMON_FUEL_ENABLE
             case AP_BattMonitor_Params::BattMonitor_TYPE_FuelFlow:
                 drivers[instance] = new AP_BattMonitor_FuelFlow(*this, state[instance], _params[instance]);
                 break;
             case AP_BattMonitor_Params::BattMonitor_TYPE_FuelLevel_PWM:
                 drivers[instance] = new AP_BattMonitor_FuelLevel_PWM(*this, state[instance], _params[instance]);
                 break;
+#endif // HAL_BATTMON_FUEL_ENABLE
             case AP_BattMonitor_Params::BattMonitor_TYPE_NONE:
             default:
                 break;

libraries/AP_BattMonitor/AP_BattMonitor.h

@@ -19,6 +19,14 @@
 #define AP_BATT_MONITOR_RES_EST_TC_1        0.5f
 #define AP_BATT_MONITOR_RES_EST_TC_2        0.1f
 
+#ifndef HAL_BATTMON_SMBUS_ENABLE
+#define HAL_BATTMON_SMBUS_ENABLE 1
+#endif
+
+#ifndef HAL_BATTMON_FUEL_ENABLE
+#define HAL_BATTMON_FUEL_ENABLE 1
+#endif
+
 // declare backend class
 class AP_BattMonitor_Backend;
 class AP_BattMonitor_Analog;